FLORA OF ADEN . 
221 
Flowers on slender, erect pedicels, few, distant, in slender, erect, 
elongated, racemose cymes ; calyx-segments short, lanceolate, subulate ; 
corolla-lobes oblong, obtuse, longer than the tube. 
Capsule inch long, twice as long as broad, oblong, crowned with 
the tooth-like calyx-segments, glabrous, top slightly rounded. 
Locality .-—Aden (O. Kuntze Rev. Gen. PL I, 292). 
Distribution : — Ceylon, Southern India, Aden. 
XXVI.— COMPOSITE. 
Herbs, shrubs or rarely trees. Leaves alternate or opposite, exstipulate. 
Inflorescence a centripetal head of usually many small flowers sessile 
on the dilated top of the peduncle (receptacle), enclosed in an involucre 
of whorled bracts. Receptacle sometimes furnished with bracteoles (paleae, 
scales), sometimes naked and smooth or with pits. Flowers either all 
bisexual or some or all 1-sexual. Calyx-tube wholly adherent to the 
ovary ; limb 0 or of scales, bristles or hairs (pappus) . Corolla epigvnous, 
gamopetalous, tubular, cylindrical or campanulate, 4 — 5-dentate with 
valvate teeth or occasionally very slender with an entire truncate 
or oblique mouth, or ligulate, the lamina spreading from the centre 
of the capitulum. Stamens 5 or 4, inserted in the tube of the corolla ; 
filaments free ; anthers 2-celled, introrse, cohering into a tube which 
sheathes the style. Ovary inferior, 1-celied ; style filiform, usually bifid ; 
ovule solitary, erect, anatropous. 
Fruit an achene, articulated to the common receptacle, generally 
sessile, naked above or crowned by the persistent sessile or stipitate 
pappus. Seed erect; testa membranous; no albumen; embryo straight; 
cotyledons plano-convex ; radicle short. 
Genera about 1,000; species about 8,000. 
Distribution /—Throughout the world. 
Tribe I — Vernonieae : Heads homogamous ; flowers all tubular, hermaphrodite. Anther- 
bases sagittate, rarely subcaudate. Style-arms subulate, hairy. Leaves 
usually alternate. Corollas never yellow . . 1. Vernonia. 
Tribe II. — Inuleae : Heads heterogamous, discoid or rayed ; or homogamous, rayless. 
Anther-bases tailed. Style-arms linear, obtuse, inappendiculate, or the 
style of the sterile flowers undivided. Leaves usually alternate. Disk- 
and ray-flowers usually yellow. 
Sub-tribe. — Plucheinese : Style-branches of the hermaphrodite florets filiform, net 
truncate 2. Pluchea. 
Sub-tribe.— Euinulem : Style-branches of the hermaphrodite florets wider and rounded 
at the apex, 
Capitula homogamous. 
Outer pappus short, not paleaceous .... 3. Iphiona. 
Outer pappus short, paleaceous, lacero-dentate . . 4. Pegolettia 
Capitula heterogamous Pulicaria. 
